An （） idea suddenly came upon him when he was taking a walk with

An （） idea suddenly came upon him when he was taking a walk with his wife.
A、ingenious
B、ingenuous
C、ingenerate
D、generous
【正确答案】：A
【题目解析】：本题考查形容词辨析。ingenious指人机灵的，主要指头脑聪明、有发明的才能。ingenuous多指人的性格、行为等是坦白、直率的，并含有天真、单纯，没有心计之义。ingenerate：天生的，内在的。generous：慷慨的，大方的。句意：当他和妻子散步时，突然想到了一个巧妙的主意。